Radiator



T. E. MURRAY 0V. L w32.

RADIATOR Filed Feb. 4, 1950 Patented Nov. 1, 1932 UNITED STATES `PATENT oFFlcE THOKAS E. MURRAY, DECEABED, LATE OF BROOKLYN, NEW YOR, BY JOHN l'. MURRAY, JOSEPH B. MURRAY, AND THOMAS E. MURRAY, J R., EXECUTORS, ALL OF BROOKLYN, NEW YORK, ASSIGNORS, BY MESNE ASSIGNMENTS, TO AMERICAN RADIATOR & STANDARD SANITARY CORPORATION, A CORPORATION OF DRLAWARE RADIATOR Application :Med February 4, 1930. Serial No. 425,758.

In a previous Patent No. 1,7 44,078 and certain pending applications there are described certain radiators of the convection type comprising horizontal tubes or similar narrow elongated heating elements to which is applied an extended area structure composed of corrugated sheets or the like forming transverse plates or fins between which are vertical passages for heating the air and inducing a strong upward draft and circulation of the heated air throughout the room to be warmed.

In such radiators the manner of securing the extended area structure to the heating element is important. The contact should be intimate and of substantial extent to secure good conductivity and should be durable under the strains set up by alternate heating and cooling, and should be as economical as possible. The present invention aims to secure these advantages in radiators of this and similar types.

The accompanying drawing illustrates elnbodiments of the invention.

Fig. 1 is a front elevation and Fig. 2 a plan of the central part of a radiator;

Figs. 3,4 and 5 are vertical sections through points at which the parts are secured together.

The heating element is a tube 11 for steam 0r other heating medium extending horizon'- tally in two sections in vertical alignment with eachother. It is preferably of copper.

The radiator may be used for cooling the lair by circulating cold brine, for example, through the tube, in which case the air cirv culation would be downward.

Applied to opposite sides of the tube are corrugated sheets forming inner longitudinal plates 12, outer longitudinal plates 13 and transverse plates or fins 14. The inner plates 12 are bent outward to form recessed portions 15 which embrace the tube so as to pro-A vide a considerable contact area. The opposite lates 12 are spaced apart slightly above and elow thetube. This is essential in Fig. 5 in order to leave room for the fastening devices, but is not essential in other figures.

Referring first to Figs. 1 and 2, immediately above and below each section of the tube the plates 12 are apertured to receive certain devices for securing the sheets to the tube. A strap 16, preferably of sti steel closely'embraces the recessed portion 15 of one of the plates 12 and has transverse portions 17 and 18 passing through the o enmgs in the plates 12 to a point laterally ond the tube.- The parts 17 and 18 have oles through them in a vertical direction.

Wedge 19-passcd through such holes bears against the plate and can be forced down sufficiently to draw the opposite recessed portions 15 of the plates 12 into close' contact with the tube.

The tubing is preferably of thin copper. The corrugated Vsheets may be of copper, aluminum, steel or other metal. They also are preferably extremely thin, the corrugated shape serving to stiifen them.

For some installations it is sufficient to have a corrugated sheet at only one side,

using a straight flat sheet or merely a series of plates 12 at the oppositel side to form anchorages for the securing devices.

Radiators of generally similar design have been built also with separate transverse plates or fins like 14 but free at their outer edges and with flanges like the plates 12 engaging the heating element. The method of fastening above described may be applied to' the flanges of such separate fins as well as to the plates 12 forming parts of the continuous corrugated sheets illustrated.

Instead of using a single wedge at one side, two wedges may be used, as in Fig. 4. Straight bars 20, 21 are assed through openings in thev plates 12. edges 22 and 23 at opposite sides engage the portions 15 of the plates and react against each other to rcss this) plates rmly into close contact wit the tu e. l

Or, as in Fig. 5, tabs 24 may be punched out of the plates 12 into positionto overlap each other, with vertical holes through which are drivenwedges 25 which draw the platestogether and clamp the recessed portions 15 thereof in contact with the tube.

It is advantageous to bring the fastening devices closely above and below the tube in order to bring the sheets into close vcontact with the tube and to hold them so; so as to prevent such yielding of the sheets when the tube is heated as would occur if the fastenings were at more remote points from the tube.

The same modifications described in connection with Figs. 1, 2 and 3 may be applied to the construction shown in Figs. 4 and 5. The points of attachment are outside of or bcyond the tubes, but it is advantageous to bring them close to the tubes in order to hold the sheets in close contact and to prevent such ielding of the sheets when the tubes are ieated as would occur if the fastenings were remote from the tubes.

The fastening means described may be supplemented. in various ways as, for example, by soldering, brazing or similar operation, either using a tilm of solder between the tube and the engaging portions of the sheets or dipping the assembled radiator so that the solder'is applied only around the edges of the contact areas.

lVhen the radiator is used for cooling air or for analogous interchanging of heat, the tube is still referred to herein as the heating element, though it may be, in fact, transmittingheat to the fluid which circulates within it, instead of in the opposite direction as in the ordinary radiator for heating the air in a room.

In the construction of Figs. 3 and 4 the recesses in the corrugated sheets may be made substantially semi-circular and the plates 12 at opposite sides brought substantially into contact so as to close the spaces above and below the tubes, securing a more compact radiator and a larger contact area between the tubes and the sheets. y

Various other modifications may be made by those skilled in the art without departing from the invention as defined in the following claims. 1

1. A radiator including a heating element, an extended area structure comprising portions embracing the heating .element and means for securing the structure to the heating element including transversely extending members and vertically movable wedges engaging said members and holding said structure in close engagement with the heating element. y

2. A radiator including aheating element, an extended area structure comprising portions embracing the heating element and means for securing the structure to the heating .element including transversely extending of said structure and engaging said members and serving to draw and hold the structure in close engagement with the heating element.

3. A radiator including a tubular heating element of circular cross section, an extended area structure comprising recessed portions embracing the heating element and means for securing the structure. to the heating element including straps fitting the outside offsaid recessed portions where they embrace the heating element and means for holding said straps tightly to secure such portions in close and extensive engagement with the heating element.

4. A radiator including a heating element, an extended area structure comprising p0rtions embracing the heating element and means for securing the structure to the. heating element including straps fitting the outside of said portions where they embrace the heating element and wedges for drawing said straps tightly to press and hold said portions into extensive and close engagementwith the heating element.

5. A radiator including a heating element, an extended area structure comprising portions embracing the heating element and means for securing the structure to the heatingelement including straps itting the outside of said portions where they embrace the heating element and means outside of said structure for holding said straps tightly to secure such portions in close and extensive engagement with the heating element.

(3. A radiator including a heating element, an extended area struct-ure in parts at opposite sides respectively of said heating element, a strap passing through both said parts and holding them in close engagement with the heating element and means for fastening said strap in place.

7. A radiator including a tubular heating element of circular cross section, an extended area structure having a recessed portion whichL fits and embraces said tubular heating element, a strap also having a recessed portion which fits and embraces the recessed portion of the said structure and holds it closely around the tubular heating element and means for fastening said strap in place.

8. A radiator including a heating element, an extended area structure in parts at opposite sides respectively of said heating element and vertically movable wedges located between said parts for drawing them and holding them in engagement with the heating element.

9. A radiator including a heating element, an extended area structure in parts at opposite sides respectively of said heating element and wedges located between said parts for drawing them and holding them in engagement with the heating element, said I .wedges engaging said parts of the extended members and vertical wedges located outside.,

area structure.

In witness whereof, we have hereunto signed our names.

JOHN F. MURRAY,

JOSEPH B. MURRAY,

THOMAS E. MURRAY, JR., E'ecutors for the Estate of Thomas E. Murmy,Deceased.k 

